JPS63274Y2 - - Google Patents

Description

[Detailed explanation of the invention] a. Purpose of the invention (industrial application field) The automatic fire extinguishing system with a manual activation mechanism according to this invention is suitable for use in places where a fire is expected to occur, such as on a kitchen stove. It is used to extinguish extinguishing agent in the event of a fire by squirting extinguishing agent from the nozzle for initial extinguishment.

(Conventional technology) For places where a fire is predicted to occur, such as on a kitchen stove, a system detects the occurrence of a fire and automatically starts to spray extinguishing agent toward the fire scene. Automatic fire extinguishing systems have traditionally been installed. Such automatic fire extinguishing systems are also equipped with a manual activation mechanism so that if someone is present at the scene of a fire, they can be activated manually before the automatic activation mechanism is activated.

In order to be able to install such a manual mechanism, the automatic starting mechanism in the conventional automatic fire extinguishing system has a structure that combines a fusible link 1 and a Bowden wire 2 as shown in FIGS. 7 and 8. There were many things. As shown in FIG. 9, the fusible link 1 is made by joining two plates 5, 5 having a circular hole 3 and a U-shaped notch 4 at both ends with low-temperature melting solder. The hole 3 is secured to one end of the inner cable 9 of the Bowden wire 2 via a bracket 6 as shown in FIG. 10, and the circular hole 3 at the other end is secured to the hook 8 of the mounting board 7. The inner cable 9 of the Bowden wire 2 is constantly pulled in the direction of arrow a in FIG. 7 by the elasticity of a spring attached to the activation mechanism of the fire extinguisher main body (not shown).
Therefore, if the mounting board 7 on which the fusible link 1 is attached is fixed in a place where a fire is predicted to occur, the heat from the fire will join the plates 5, 5 that make up the fusible link 1. The solder melts, the cable 9 of the Bowden wire 2 becomes movable in the direction of arrow a, and the automatic activation mechanism of the fire extinguisher is activated.
When starting the fire extinguisher manually, the fire extinguisher is started before the solder of the fusible link 1 melts by means such as pulling out a locking rod separately provided on the starting mechanism.

(Problems to be Solved by the Invention) However, in the conventional automatic fire extinguishing system having a manual activation mechanism constructed and operated as described above, the following disadvantages occur.

That is, the length of the Bowden wire that connects the starting mechanism of the fire extinguisher and the fusible link is 1 to several meters, making it difficult to adjust. Since the length of the inner cable protruding from the outer cable changes depending on the condition, adjustment is required at the installation site. Furthermore, since the inner cable is constantly tensioned by the spring of the activation mechanism, it stretches over a long period of time and must be adjusted each time. If this adjustment work is neglected, in extreme cases the fire extinguishing system may start even though no fire has occurred.

There are other types of automatic fire extinguishing systems that have a manual activation mechanism and are activated by electrically detecting the occurrence of a fire, but they may become useless due to a power outage associated with a fire, or if left unused for a long period of time. It may not start up due to battery discharge, so it cannot be said that the reliability is sufficient.

In order to solve the above-mentioned inconveniences, this invention
It is an object of the present invention to provide an automatic fire extinguishing system having a manual activation mechanism that does not require or requires very simple adjustment work during installation or after installation, and that is reliable and highly reliable in operation.

b. Structure of the invention (means for solving the problem) The automatic fire extinguishing system with a manual activation mechanism of the invention consists of a lid attached to the upper opening of a fire extinguishing agent container filled with pressurized gas and extinguishing agent. A siphon pipe is fixed on the bottom surface, and a branch pipe communicating with the siphon pipe is fixed on the top surface. A first injection nozzle is fixed to the other end of a first injection pipe whose one end is connected to one side of this branch pipe, and a closing plate is fixed to the open end of this first injection nozzle by low-temperature melting solder. and closes the end opening of this nozzle.

Furthermore, a valve housing having a valve seat on the inner circumferential surface of the intermediate portion and containing a valve body which is brought into elastic contact with the valve seat by a first spring abutting on one end surface is connected and fixed to the upper part of the branch pipe. ing. A second spring having stronger elasticity than the first spring faces the other end of the valve body, but normally this spring is inserted into the valve housing through a cut formed on the side surface of the valve housing. The inserted blocking plate separates the valve body from the end face of the valve body. One end of a second jet pipe is connected to a part of the valve housing that is farther from the branch pipe than the valve seat, and an open second jet pipe is connected to the other end of the second jet pipe. The nozzle is fixed.

(Function) The automatic fire extinguishing system having a manual activation mechanism of the present invention configured as described above is installed with both the first and second injection nozzles facing a location where a fire is expected to occur.

Under normal conditions, the opening of the first injection nozzle is closed by a closing plate, and the valve element, which is brought into elastic contact with the valve seat by the first spring, allows communication between the inside of the extinguishing agent container and the second injection pipe. Since communication is cut off, extinguishing agent is not injected from either the first or second injection nozzle.

In the event of a fire, the heat from the fire will melt the low-temperature melting solder that fixes the closing plate to the end opening of the first injection nozzle, causing the closing plate to come off and the extinguishing agent in the extinguishing agent container to be released into the first nozzle. Spray from the injection nozzle.

When starting the fire extinguisher manually, remove the blocking plate from inside the valve casing. As a result, the second spring, which had been separated from the valve body until then, comes into contact with the valve body,
This valve body is separated from the valve seat against the elasticity of the first spring. As a result, the extinguishing agent in the extinguishing agent container is sent out through the second ejection pipe, and is ejected from the open second injection nozzle toward the fire site.

(Example) Next, the present invention will be explained in more detail by explaining the illustrated embodiment.

FIG. 1 is a partial longitudinal sectional side view showing the overall configuration of an automatic fire extinguishing system having a manual activation mechanism according to the present invention. A short cylindrical opening 11 fixed to the upper end of a fire extinguishing agent container 10 filled with pressurized gas and a fire extinguishing agent 10 is covered with a lid 12 and fixed with a cap nut 13. This lid body 12 is provided with a through hole 14 in the vertical direction, and the upper end of a siphon pipe 15 whose lower end is opened at the bottom of the extinguishing agent container 10 is connected to the lower end opening of the through hole 14. has been done. Further, a branch pipe 16 is connected to the upper end opening of the through hole 14, and the inside of this branch pipe 16 communicates with the siphon pipe 15. One end of a first ejection pipe 17 and a pressure gas filling port 18 are provided on the intermediate side surface of the branch pipe 16, respectively. At the other end of the first jet pipe 17, a first jet nozzle 1 is connected.
9 is fixed. This first injection nozzle 19
is installed near a place where a fire is predicted to occur, and a closing plate 20 is fixed to the open end with low-temperature melting solder.

Further, a valve housing 21 as shown in detail in FIG. 2 is fixed to the upper end of the branch pipe 16. The valve housing 21 consists of a main part 22 whose lower end is hermetically screwed onto the branch pipe 16, and a cylinder tube 24 fixed above the main part 22 with screws 23,23.
A circular hole is formed inside the lower main portion 22 by connecting a lower large-diameter portion 25 and an upper small-diameter portion 26 with a valve seat 27 shaped like an inverted mortar. Furthermore, a first compression spring is installed between the lower surface of the top-shaped valve body 29 formed at the lower end of the valve rod 28 that passes through the upper surface of the main portion 22 in an airtight manner and the stepped portion 30 formed at the upper end of the branch pipe 16. 31 is provided to impart elasticity to the valve body 29 toward the valve seat 27.

A piston plate 32 is fixed to the upper end of the valve rod 28 that protrudes upward from the upper surface of the main portion 22 and is fitted into the cylinder tube 24 so as to be movable up and down. A second compression spring 34 is provided between the upper surface of the piston plate 32 and the lower surface of the screw cap 33 screwed onto the upper end of the cylinder tube 24 . This second compression spring 34
The elasticity of the first compression spring 31 is stronger than that of the first compression spring 31, and therefore, when the lower end of the second compression spring 34 comes into elastic contact with the upper surface of the piston plate 32, the valve body 2
9 is the valve seat 27 against the elasticity of the first compression spring 31.
move away from A second ejection pipe 35 is provided on the upper side surface of the main portion 22 of the valve housing 21 in a portion facing the small diameter portion 26.
One end is connected to this second ejection pipe 35
An open second injection nozzle 36 is fixed to the other end. Like the first injection nozzle 19 described above, this second injection nozzle 36 is also fixed toward a place where a fire is predicted to occur, such as the top of the stove.

In the middle part of the cylinder tube 24, as shown in FIG. 3, parallel cuts 37, 37 are formed on opposite surfaces, and in these cuts 37, 37, a bifurcated blocking plate 38 as shown in FIG. 4 is formed. is inserted in the state shown in FIG. This blocking plate 38 has a pair of insertion portions 41 and 41 at a distance D that is the same as or slightly wider than the distance d between the cuts 37 and 37 from the base 40 in which a circular hole 39 for finger hooking is bored.
41 was formed. Such a blocking plate 3
The second compression spring 34 is inserted from the upper end of the cylinder tube 24 with the insertion portions 41, 41 of No. 8 inserted into the cuts 37.
When the screw cap 33 is inserted and the screw cap 33 is attached, the lower end of the second compression spring 34 is resiliently mounted on the upper surface of the insertion portions 41, 41 and does not touch the upper surface of the piston plate 32. 45 (Fig. 5) is the folding part 4 at the tip of the insertion part.
6, 46 are sealed with vinyl tape or the like.

Furthermore, a piston 42 as shown in FIG. 6 is attached to the lid 12 attached to the mouth 11 of the extinguishant container 10 in a vertically movable and airtight manner. The lower surface of this piston 42 is exposed inside the fire extinguisher container 10, and the upper surface faces the micro switch 44 via a lever plate 43.

The automatic fire extinguishing system having a manual automatic mechanism of the present invention constructed as described above operates as follows.

First, in the standby state, the insertion portions 41, 41 of the blocking plate 38 are inserted into the notches 37, 37 of the cylinder tube 24.
2, the lower end of the second compression spring 34 comes into contact with the upper surface of the insertion part 41 as shown in the right half of FIG.
Since the valve body 29 is not pushed by the first compression spring 31 and comes into contact with the valve seat 27, communication between the inside of the fire extinguishant container 10 and the second ejection pipe 35 is cut off.
Therefore, no extinguishing agent is ejected from any of the injection nozzles.

Next, when a fire occurs, the first ejection pipe 1 that communicates with the inside of the fire extinguishing agent container 10 is located below the valve body 29.
The solder fixing the closing plate 20 that closed the opening of the first jet nozzle 19 fixed to the end of the nozzle 7 melts.
This closing plate 20 is pushed and blown away by the pressure within the fire extinguishing agent container 10, and the fire extinguishing agent is ejected from this nozzle 19.

When starting the fire extinguisher manually, blocking plate 3
Insert your finger into the circular hole 39 of No.
Pull it out from inside 37. As a result, as shown in the left half of FIG. 2, the lower end of the second compression spring 34 comes into contact with the upper surface of the piston plate 32 and pushes it downward.
Separate the valve body 29 from the valve seat 27. Therefore, the extinguishing agent in the extinguishing agent container 10 is sent into the second ejection pipe 35 and is ejected from the open second injection nozzle 36.

When the fire extinguishing system is started automatically or manually and the pressure inside the fire extinguishing agent container 10 decreases, the piston 42 provided in the lid body 12 descends and the micro switch 44 is activated.
The contact is closed and a separately installed buzzer etc. is used to issue an alarm. This alarm is also issued when the pressure inside the fire extinguishing agent container 10 decreases due to leakage, so when the alarm is issued, the fire extinguishing system should be inspected immediately. When the operation of the alarm device is confirmed, the lever plate 43 is pushed down to close the contact of the micro switch 44.

Note that the shape of the blocking plate 38 inserted into the cylinder tube 24 is not limited to that shown in the drawings.
In short, any material that can prevent the second compression spring 34 from descending during insertion is sufficient. For example, the width of all or part of the blocking plate 38 may be made narrower than the diameter of the cylinder tube 24, and this portion may be inserted into the cylinder tube 24.

c. Effects of the invention Since the automatic fire extinguishing system with a manual activation mechanism of the invention is constructed and operates as described above,
No adjustment work is required at the installation site other than regulating the direction of the injection nozzle, and even an amateur can easily install it, and the operation is reliable and highly reliable.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical side view showing the overall configuration of an automatic fire extinguishing system having a manual activation mechanism according to the present invention;
Figure 2 is an enlarged vertical side view of the upper part of Figure 1, Figure 3 is a perspective view of the cylinder tube, Figure 4 is a perspective view of the blocking plate, and Figure 5 is a view from above Figure 2. A plan view, FIG. 6 is a vertical sectional view seen from the right side of FIG. 1, FIGS. 7 to 10 show the starting mechanism of a conventional automatic fire extinguishing system, and FIG. 7 is a front view of the fire detection unit.
8 is a sectional view taken along the line AA in FIG. 7, FIG. 9 is an exploded perspective view of the fusible link, and FIG. 10 is a perspective view of the bracket. 1: Fusible link, 2: Bowden wire, 3: Circular hole, 4: Notch, 5: Plate material, 6: Bracket, 7: Mounting board, 8: Hook, 9: Inner cable, 10: Fire extinguisher container, 11: Mouth, 1
2: Lid body, 13: Cap nut, 14: Through hole, 15:
Siphon pipe, 16: branch pipe, 17: first ejection pipe, 18: pressure gas filling port, 19: first injection nozzle, 20: closing plate, 21: valve housing, 22: main part,
23: Screw, 24: Cylinder tube, 25: Large diameter part,
26: Small diameter part, 27: Valve seat, 28: Valve rod, 29:
Valve body, 30: Step portion, 31: First compression spring, 3
2: Piston plate, 33: Screw cap, 34: Second compression spring, 35: Second jet pipe, 36: Second jet nozzle, 37: Cut, 38: Blocking plate, 39: Circular hole, 40: Base, 41: Insertion part, 42: Piston, 43: Lever plate, 44: Micro switch, 4
5: Sealing, 46: Folding section.

Claims (1)

[Scope of utility model registration request] A siphon pipe that opens at the bottom of a fire extinguishing agent container filled with extinguishing agent and pressurized gas is fixed to the end of a first ejection pipe that communicates with the siphon pipe below the valve casing provided above the mouth of the container. the opening of the first injection nozzle,
The end of the second ejection pipe is closed with a closing plate fixed with low-temperature molten solder, and communicates with the siphon pipe through a valve body that comes into elastic contact with a valve seat formed in the valve housing by the elasticity of the first spring. A second open-type nozzle is fixed, a second spring is inserted into the valve housing and presses the valve body in the opposite direction to the first spring with a stronger elasticity than this spring, and a cut is formed in the valve housing. An automatic fire extinguishing system having a manual activation mechanism that separates the second spring from the valve body when a blocking plate that can be freely inserted and removed from the valve housing is inserted.